Sand drier



Cd. 29, 1940. J. RAIGQSA 2,219,634

SAND DRIER Inventor A ttqmeys Get. 239, 19453. .1. RAIGOSA v SAND DRIER Filed April 22, 1938 3 Sheets-Sheet 2 I L, z?

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I I 3! Inventor cifis wgaaa 9 By o Attorneys CL 91 J. RAIGOS-A 2,219,634

SAND DRIER Filed'April 22, less :5 She ets-Sheet s" -dya 'a. 6!

A tiom'eys Patented Oct. '29, 1940 r UNITED STATES I FATENT OFFICE SAND DRIER- v Jose Raigosa, El Paso, Tex. Application April 22, 1938, Serial No. 203,658 l 3 Claims. (01. 34-454) My invention relates generally to means ror drying sand, utilizing steam coils as the drying agent, and particularly to a sand drier especially constructed and adapted for installation and use at a building site, and preferably being portable, and an important object of my invention is to provide a simple, efiicient, and relatively inexpensive arrangement of this character. if Other important objects of my invention will be apparent from a reading of the following description taken in connection with. the drawings, wherein for purposes of illustration I have shown a'preferred embodiment of my invention..

In the drawings:

'; Figure 1 is a general elevationalview of the I embodiment with the sprocket case broken away.

Figure 2 is an'elevational view similar to Fi ure 1 but showing the exterior of the sprocket chain case.

Figure 3 is a top plan view of Figure 1.

Figure 4 is a bottom plan view of Figure 1'. v Figure 5 is a longitudinal sectional view taken through Figure 1. I j V Figure 6 is a transverse vertical sectional view taken through Figure 5 approximately on the line 66 and looking toward the left in the direction of the arrows.

Referring in detail to the drawingsthe nu- M meral 5 generally designates an elongated rec- UU' tangular casing formed by longitudinal side walls 6, 1 whose opposite ends are secured to the outersideof a flange of the angle iron corner supports 8, 9, the lower portions of the supports 8 ,9 extending below the bottom of the casing and acting as legs to support the casing in spaced relation to the ground I0. The'end walls II and [2 have inturned flanges I2, l3 which are'secured to'the inner face of the same flange of the angle r irons as the ends of the longitudinal side memhers-6 and I are secured to. Longitudinal angle irons l4 and I5 are secured to the outer side of the longitudinal walls Band! adjacent the upper part thereof to lend rigidity to the structure and tot facilitate handling, when installing or remov- I 5 ing the device from one site to another.

The lower edges of the end walls II and I2 are curvedly inturned as indicated by the numerals l6 and reach to the point I! which constitutes one side of an opening in which the correspond- 50 mg one of the rotors, respectively designated I8. i9, 20, turns, and through the sand is discharged from the bottom of the casing 5.

i A' partition acting as a bottom for the casing is generally designated}! and comprises atleast 65 two transversely' extending -vertically projecting triangular forms 22, the slanting walls of which terminate at their lower ends in curvedportions 23, 24, the terminals of which define the sides of the openings in which the various rotors turn.

Theprojections 22 separate the interior of the 5 7 casing 5 into sand heating and drying compart ments. 7 7

Each of therotors I8, I9, 2ll-comprises a rotary shaft 25 which has one end journaled in a roller v bearing26 secured to the outside of the longi- 1o tudinal wall 6 which the shaft traverses, and its opposite end journaled in a 'secondroller bearing 21 similarly mounted on the outer side of the longitudinal casing wall 1. The last mentioned end of the shaft 25 has secured thereto" 'a 1B sprocket wheel' 28 over which is trained a sprocket chain 29. Projecting radially from-that portion of the shaft which lies between the side walls 6 and 1 and at equally circumferentially' spaceddistances are thediametrically opposed {6* paddles 30, 3| which are elongated rectangular in shape and'so disposed that when a pair of paddles is horizontally aligned ,withthe edges of the openin'gsiri the bottom 2| of the casing, theseopeningswillbe closed so as to prevent the 25 fall of sand from the respective-compartment.- The turning f the rotors has'alsothe function of agitating the sand within the-particular com partm ent and also the functionof moving the sand to expose the same uniformly to the heat of 80 thecoils to be described One of the rotors, preferably thecentral one designated 19 has its shaft provided with a projecting portion 32 Which-receives a manual crank 33, and a large sprocket wheel 24 is provided on this shaft and over which at the sprocket chain 29 is trained, so that by turning the'crank 33'the operator may determine the amount of sand discharged from the heating compartments, or arrange for retention of the I sand within all of the compartments by os tion- 40' ingjthe rotors with diametrically opposed pairs of paddles horizontally aligned with the edges of the openings in the bottom 2! of the casing. The sprocket wheels and the sprocket chain are enclosed in an elongated case 35 conforming generally in shape'to the'outline of the sprocket chain and this is secured in some suitableread ily removable mannerto the stationary portion of the roller bearingson the corresponding side of the casing.

The heating coils are arranged in groups within each of the heating compartmentsso as to heat the upper and intermediate andlower por tions of these compartments, and in addition heating coils are providedbeneath the bottom 2|? larly arranged but the tiers are arranged at an i the central compartment.

of the casing so as to thoroughly and uniformly heat the bottom. Connection of a suitable source of steam supply may be made to the terminal 36 of the steam coil and from this point the coil leads in a horizontal portion indicated by the numeral 3! across the left hand compartment and supportably over the top of the transversely spaced longitudinal support bars 36 and 39 which are connected at their opposite ends to the upper part of the end walls II and i2 of the casing. Similar support rods 40 and M are disposed exactly beneath but spaced from the bars 38 and 39. From the end of the horizontal portion 31 extends downwardly a hairpin bend 42 which merges into a horizontal portion 43 which runs back across the casing under the horizontal portion 31 and approximately parallel thereto and from the far end of the portion 43 extends a downward hairpin bend 44 which merges into a horizontal portion 45. The portion 43 rests on the support bar 39 while the horizontal portion 45 rests on the support bar 46. The portion 45 merges into a hairpin bend 46 which emerges into a horizontal portion 41 which rests on the support bar 4| beyond which the portion 41 has a return hairpin bend 46 which merges into a horizontal portion 49 which terminates in a horizontally positioned hairpin bend 50 which leads into the lowermost horizontal portion 5| of an arrangement of coil similar to that already described, so that there are two vertical tiers of convolutions in each of the end compartments of the casing. The similarly arranged vertical tiers of the central compartment are not perpendicuacute angle to a middle tier which is arranged at a perpendicular angle. As shown in Figure 3 a portion 5| connects the top adjacent tiers of the left hand battery of convolutions with the left hand one of the battery of convolutions in the central compartment, at the top thereof, while a coupling equipped portion 52 connects the lower part of the adjacent tiers of the right hand compartment and the extreme right tier of The lowermost convolution of the right hand tier of the right hand compartment is connected by a coil portion 53 with a union 54 to which is connected a coil portion 55 which feeds the casing bottom heating coil assembly which is generally designated 56.

The coil arrangement 56 consists of a longitudinal coil portion 51 which has a discharge end 58; and a longitudinal coil portion 59 which includes the portion 55 which is connected to the union 54. The longitudinal coil portions 51 and 59 both have upset portions 60 and 6| which reach into the space between the upwardly projecting triangular portions 22 of the bottom of the casing, and other downwardly curved portions 62, 63 and 64 which are disposed below the respective rotors 18, I9, and 20 so that the rotors will clear the same in rotating. At the junction point of the portions 60, 62; 60, 63; 6|, 63; SI, 64 are vertically spaced pairs of transversely arranged pipes 65, 66 and 6?, 68, respectively, which connect the longitudinal coil portions 51 and 59. Additional transverse pipes 69 and II! at the right hand end of the bottom coil assembly 56 connect the corresponding ends of the longitudinal pipes 51 and 59 so as to produce a closed circuit for the steam or other heating fluid. Other transverse tubes H and 12 connected between the longitudinal tubes 51 and 59 at the right 'hand end thereof are disposed inwardly of the connection points 50 and 55. By' means of the arrangements described, steam r other heating fluid being introduced through the connection 58, the heating fluid will pass first through the bottom heating assembly 56 and then upwardly through the connection 53 to the right hand battery of coils in the right hand heating compartment, thence to the central heating compartment, and then from the top of the coil assembly therein to the top of the coil assembly within the left hand heating compartment, thereby evenly and uniformly heating the sand which may be introduced into each or any of the compartments and drying the same for discharge in a properly dried condition from the openings in the bottom of the casing by opera tion of the rotors through manipulation of the crank handle 33.

Although I have shown and described herein a preferred embodiment of my invention, it is to be definitely understood that I do not desire to limit the application of the invention thereto, and any change or changes may be made in the structure and arrangement of parts, within the spirit of the invention and the scope of the subjoined claims.

Having described the claimed as new is:

l. A sand drier comprising a substantially rectangular elongated casing formed in its bottom with transverse sand discharging openings, said discharging openings being spaced from each other and from the ends of the casing, a hollow inverted V-shaped partition between adjacent ones of said discharging openings, said partition being pen at its bottom, said partitions reaching up into the casing and across the same so as to divide the interior of the casing into sand drying compartments, gate means disposed in each of said discharging openings for opening and closing the same, and heating means consisting of a web of pipes disposed along and beneath a substantial area of the bottom of the casing, elevated portions of said heating pipes extending up into the interior of said hollow partitions through the open bottoms thereof, other portions of said heating pipes extending at a level below the opposite end portions of said discharging openings in heating relation to the gates.

2. A sand drier comprising a substantially rectangular elongated casing formed in its bottom with transverse sand discharging openings, said discharging openings being spaced from each other and from the ends of the casing, a hollow inverted V-shaped partition between adjacent ones of said discharging openings, said partition being open at its bottom, said partitions reaching up into the casing and across the same so as to divide the interior of the casing into sand drying compartments, gate means disposed in each of said discharging openings for opening and closing the same, and heating means disposed along and beneath a substantial area of the bottom of the casing, elevated portions of said heating means extending up into the interior of said hollowpartitionsthrough the open bottoms thereof, other portions of said heating means extending along the sides and across the ends of said discharging openings.

3. A sand drier comprising a substantially rectangular elongated casing formed in its bottom with transverse sand discharging openings, said discharging openings being spaced from each other and from the ends of the casing, a hollow inverted V-shaped partition between adjacent invention, what is ones of said discharging openings, said partition being open at its bottom, said partitions reaching up into the casing and across the same so as to divide-the interior of the easing into sand drying compartments, rotary gate means disposed in each of said discharging openings on I an axis transverse with respect to the casing for opening and closing said discharging openings, and heating means disposed along and be- 1'0 neath a substantial area of the bottom ofthe casing, elevated portions of said heating means extending up into the interior of said hollow partitions through the open bottoms thereof,depressed portions of said heating means located between said elevated 'portions of the heating 5 means being arranged'beneath each of said gate means, and common operating means for operating said rotary members together.

Jose RAIGOSA. 10 I 

